The influence of temperature on the velocity of sound in green pine wood
The influence of temperature on the velocity of sound in green pine wood
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DOI：
10.1007/s00107-005-0083-7
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发表时间：
2006-03
期刊：
影响因子：
--
通讯作者：
H. Bächle;John C. F. Walker
中科院分区：
文献类型：
--
作者：
H. Bächle;John C. F. Walker
使用4种专有声学工具确定了温度对28种新伐松（辐射松）原木声学特性变化的影响：飞行时间工具（TOF; TreeTap和Sylvatest Duo）;和共振工具（WoodSpec和Director HM 200）。在-19° C、4° C、19° C、39° C和-5 ° C下依次进行测量，并在-19 ° C下再次进行测量。在冰点以下，TOF和共振工具的声速分别降低了7.2和10.4 m/s/°C。在冰点以上，对于TOF工具，声速每升高1 °C降低3.2 m/s，对于共振工具，声速每升高1 °C降低3.5 m/s。在0°C时声速的突然下降是1000米/秒，冷冻的木材更硬。
The influence of temperature on the changes in the acoustic properties of 28 freshly-felled pine (Pinus radiata) logs was determined using 4 proprietary acoustic tools: time-of-flight tools (TOF; TreeTap and Sylvatest Duo); and resonance tools (WoodSpec and Director HM200). Measurements were taken sequentially at -19°, 4°, 19°, 39° and -5°C, and again at -19°C. Below freezing, the acoustic velocity decreased by 7.2 and 10.4 m/second per °C for the TOF and resonance tools, respectively. Above freezing, the acoustic velocity decreased by 3.2 m/second per °C rise in temperature for the TOF tools, and 3.5 m/second for the resonance tools. The abrupt drop in acoustic velocity at 0°C was ∼1000 m/second, with the frozen wood being stiffer.